中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

340 records (took 0.028 seconds)

    81.
    发明专利
    未知

    公开(公告)号：DE3856318D1

    公开(公告)日：1999-05-06

    申请号：DE3856318

    申请日：1988-10-17

    Applicant: CANON KK

    Inventor： AOKI AKIO ,  NAGASAWA KENICHI

    IPC: H04N7/26 ,  H04N7/32 ,  H04N7/36 ,  H04N7/46 ,  H04N7/24

    Abstract: A predictive coding system is disclosed wherein an input data sequence (at a) sequentially including a number of samples (at b to d) is subjected to time-base expansion (at e to g) by n times, where n is an integer not smaller than 2, using an interval of a predetermined period including a plurality of samples as a unit to form n-channel data sequences, and said n-channel data sequences are input in n predictive coding means (6 to 8) in parallel. The coded sequences may then be time-base compressed and then multiplexed (at h). A decoding system may operate in a somewhat similar manner.

    Image encoding apparatus
    83.
    发明专利
    Image encoding apparatus 未知

    公开(公告)号：SG43261A1

    公开(公告)日：1997-10-17

    申请号：SG1996006638

    申请日：1992-01-31

    Applicant: CANON KK

    Inventor： SHIKAKURA AKIHIRO ,  TAKIZAWA HIROSHI ,  NAGASAWA KENICHI ,  ENARI MASAHIKO ,  SATAKE YOSHIFUMI

    IPC: G06T9/00 ,  H04N7/26 ,  H04N7/30

    Abstract: In an image encoding apparatus, conversion data obtained by converting image information onto a frequency region (26-30), and corresponding to several frames are parallelly output using a one-frame period delay circuit (34a-34d). The parallelly output conversion data are quantized by a quantization circuit (32a-32d), and a data amount to be obtained when the quantized data are encoded is obtained by a variable-length coding circuit (40a-40d). The data amount information is input to a coefficient operation circuit (44a-44d) for determining a quantization step of the next stage. Conversion data quantized (32e) according to an output from the coefficient operation circuit (38e) are encoded (40e), and the encoded data are output.

    85.
    发明专利
    未知

    公开(公告)号：DE69216436T2

    公开(公告)日：1997-05-15

    申请号：DE69216436

    申请日：1992-01-28

    Applicant: CANON KK

    Inventor： NAGASAWA KENICHI ,  SHIKAKURA AKIHIRO

    IPC: G06T9/00 ,  G11B20/18 ,  H03M13/29 ,  H04N7/26 ,  H04N7/30 ,  H04N7/54 ,  H04N7/66 ,  H04N7/24

    Abstract: When forming a data block which includes both an image code obtained by carrying out variable length coding for each of plural regions resulted from dividing each picture provided by an image signal, and added information associated therewith, boundary information indicative of a position, in the data block, of the boundary between the image codes in adjacent twos of the divided regions is added into the data block. There are also formed in the data block a first error detection or correction code to make up a code word which includes the boundary code, but does not include the image code, and a second error detection or correction code to make up a code word which includes both the image code and the boundary code. Alternatively, in the block which includes main information and added information associated with the main information in time series there are formed a first error detection or correction code to make up a code word which does not include the main information, but includes both the added information and a first check bit, and a second error detection or correction code to make up a code word which does not include the first check bit, but includes the added information, the main information and a second check bit.

    87.
    发明专利
    未知

    公开(公告)号：DE69026143T2

    公开(公告)日：1996-08-22

    申请号：DE69026143

    申请日：1990-06-01

    Applicant: CANON KK

    Inventor： HOSHI NOBUHIRO ,  ISHII YOSHIKI ,  NAGASAWA KENICHI

    IPC: G11B20/18 ,  H03M7/00 ,  H04N7/32 ,  H03M13/00 ,  H03M7/30

    Abstract: A decoding device used in a predictive coding method includes a replacement circuit for replacing a decoded value corresponding to an encoded code having an uncorrectable error with the decoded value of the immediately preceding sample, and decoding of the succeeding sample is performed according to the decoded value output from the replacement circuit.

    Audio mirror speaker
    88.
    发明专利
    Audio mirror speaker 未知

    公开(公告)号：GB2240450B

    公开(公告)日：1994-08-31

    申请号：GB9101364

    申请日：1991-01-22

    Applicant: CANON KK

    Inventor： YAGISAWA TOSHIHIRO ,  IBARAKI SHOICHI ,  KASHIDA MOTOKAZU ,  NAGASAWA KENICHI

    IPC: H04R1/34

    Abstract: In an audio mirror speaker, an uneven area is formed on a planar mirror surface and a directivity distribution is controlled by changing a relative position of a diaphragm facing the mirror surface and the mirror. The directivity distribution of such a speaker is determined by a radius of curvature of the uneven area. Since the directivity changes with various movements of the planar mirror, a freedom in setting the directivity distribution is enhanced.

    Audio mirror speaker
    90.
    发明专利
    Audio mirror speaker 未知

    公开(公告)号：GB2240450A

    公开(公告)日：1991-07-31

    申请号：GB9101364

    申请日：1991-01-22

    Applicant: CANON KK

    Inventor： YAGISAWA TOSHIHIRO ,  IBARAKI SHOICHI ,  KASHIDA MOTOKAZU ,  NAGASAWA KENICHI

    IPC: H04R1/34

    Abstract: In an audio mirror speaker, an uneven area 2 is formed on a planar mirror surface 1 and the directivity distribution is controlled by changing the relative position of a speaker diaphragm 3 facing the mirror surface and the mirror. The directivity distribution of such a speaker is determined by the radius of curvature of the uneven area. Since the directivity changes with movements of the planar mirror, freedom in setting the directivity distribution is enhanced.

Patent Agency Ranking